摘要
利用ANSYS CFX软件对板翅式废气再循环(exhaust gas recirculation,EGR)冷却器进行气-固-液耦合传热计算,分析冷却器中气液温度场及速度场,对比研究光管型、含有波型翅片及含有凹坑的3种冷却器的换热效率。结果表明:当冷却器增加翅片之后,换热效率与光管型冷却器相比提高了26.7%,气体流动更加稳定,过渡区域的涡流减少;而增加凹坑之后的冷却器的换热效率相比光管型冷却器降低了5%,且其流速减慢,过渡区域出现大面积的涡流。
The gassolidliquid coupling heat transfer calculation of platefin exhaust gas recirculation(EGR)cooler is carried out by using ANSYS CFX software.The gasliquid temperature field and velocity field in the cooler are analyzed,and the heat exchange efficiency of light tube type and 3 kinds of cooler containing wave type fins and pits are compared and studied.The results show that when the fins add to the cooler,the heat exchange efficiency increases by 26.7% compared with the optical tube cooler,the gas flow is more stable,the eddy current in the transition area decreases,and the heat exchange efficiency of the cooler after adding pits goes down by 5% compared with the optical tube cooler,and the flow rate slows down,and the transition area has a large eddy.
作者
季松
龙文元
刘伟国
JI Song;LONG Wenyuan;LIU Weiguo(School of Aeronautical Manufacturing Engineering,Nanchang University of Aviation,Nanchang 330063,China;Shenzhen Xinqibin Technology Co.,Ltd.,Shenzhen 518000,China)
出处
《内燃机与动力装置》
2018年第6期11-19,共9页
Internal Combustion Engine & Powerplant
